2011 Arctic Cat 400 TRV ATV Service Manual, Page 37Get this manual
NOTE: To produce the proper 60 cross-hatch pattern, use low RPM drill (600 RPM) at the rate of 30 strokes per minuteIf honing oil is not available, use lightweight petroleum-based oilThoroughly clean cylinder after honing using soap and hot waterDry with compressed air; then immediately apply oil to the cylinder boreIf the bore is severely damaged or gouged, replace the cylinder ATV1013A
2The lobe heights must not exceed minimum specificationsInspecting Camshaft Bearing Journal 1Inspect the bearing journal for scoring, seizure marks, or pittingCC390D
4If any measurement exceeds the limit, bore the cylinder and must be replacedMeasuring Camshaft Runout
NOTE: If the camshaft is out of tolerance, it must be replaced
2If excessive scoring, seizure marks, or pitting is found, the cylinder head assembly must be replacedMeasuring Camshaft to Cylinder Head Clearance 1Loosen the jam nuts and adjuster screws